Prevents possible clashes when using vkd3d with external Win32 headers.
Signed-off-by: Józef Kucia <jkucia@codeweavers.com>
Signed-off-by: Henri Verbeet <hverbeet@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
For cross-compilation of demos. Ideally we'd just depend on the MinGW-w64
headers for these, but we can't depend on those being new enough to include
these interfaces.